I think that silver is good, if you want to be noticed by inattentive drivers, i.e. because it's bright like white, they see you coming. Also, silver is easy to keep looking clean.
However, silver paint can never be made to appear deep and rich like dark colors, such as red, green, blue, or black. The classic Zaino's type mirror reflection of a collector's car is not possible with silver.
So you need pick a color based on your needs.
IMO a deep reflective shine is an esential part of owning a very special car. I see silver BMW's and Audi's every where around here (S. CA), and to me, it's too common. Frankly, NSXs are so uncommon that it doesn't matter which color you get, all eyes will be on it as you go by.
There's a 91 silver NSX for sale on Autotrader.com, but it has 80k miles ($36,000).
Best Luck.
NSXY